I haven't seen that app in quite a while, and I'm not sure you can use it anymore.

Click to expand...

I've seen it recently
It wasn't on the prior version of software for the Evo 4G LTE, but the most recent update to 4.3 w/ Sense 5 [Root] included Teeter again (unless it was quietly added to the Stock build by the developer that released the files...? Cap'n?).

Amongst many other things, HTC has been VERY inconsistent with including it, or not, over the years.